1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e04e1abb1f1e8c05d7778ff1045f6a4a890c03c5cf090d0a8d48e821e8e2d0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d529d35d-b5ea-4c3c-a2c2-010bee9036bb.json and https://artists.proofprofile.net/proofs/artist/d529d35d-b5ea-4c3c-a2c2-010bee9036bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd904db89d7daee8b5889f461375e533cc565d090ab337ab931ea7289542232c3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2259658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420eb0cc135cb1d777c321ff1e73bc652038384cab2512aa16888df967d15ce0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2259659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61113af4c7cfdbaa70d830c826d037107f425dfcc30a4c3d4f515eae0a83e67. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2259660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0294f65d17c423a5665fd7e43394bd104480a62f747d13bb1998d03e7aa7f70a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2259661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0640ae6b2234848f91048b099982ad9a788921513260db681a4321f43d160c7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2259662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ed21e4c972b2c4bc61cb7869d9b9869ee12997e112fe5f3ba4b29e02fff13. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:53:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2259665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc27208286ed1f4c242f8ebdc3b2c1234b4a3c3570451a59db25222fc3388e0d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2259666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759c7aee1ebcd02990fa0d4978d9e871d92f68740492cc9c058b3d12c27469d8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2259667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed981fee7b6d08b990f6ddb9e6a758fce8860048573a2b1ad55869925f21988. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA62360184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ad54b8c507452f993b662233677842c8054568abf0935bfbabd45da5ff54f9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62369447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20298ac88aa03c8c8b897f93ce8ec35c094fa2078d11d0f4d57811ef29f64a78. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2305903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adbea7ed43d5b8049c7c33986481beb2fd533ef308c151da88d148b760858a6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:27:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2426708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf90292cb37be59e27f17f1d81fed4bc2bae6b688853328d7a8c64821362621. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92454027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673a1dce3d0e42f74dfee3c7424d31095aaf4ddf3582c2f4848c21dda283f3f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32496866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a77e6bfa24680168bd3c01d67015364a0e7479f855cba57748d3360bf710eb. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB32431870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2d48c91e0d9772a381ba9a207818cbaa2bf8dad822c00b222885b41c60829f. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFV2418802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5485f6a9c21a35f6ef4d0dfcf323f4704cf67e809a0fad03f8d07bc31a21f41e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2584710.